Modify DEBUG_PREFIX_MAP as used by sed to handle
whitespace correctly.
This modifies an existing patch.
(From OE-Core rev: bf746c2dea3ade181e91ef12d41dfe4286949e1d)
Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>